1668655032129 has 40 divisors (see below), whose sum is σ = 2530187343200. Its totient is φ = 1095702816384.

The previous prime is 1668655032119. The next prime is 1668655032131. The reversal of 1668655032129 is 9212305568661.

1668655032129 is a `hidden beast` number, since 1 + 6 + 6 + 8 + 6 + 5 + 503 + 2 + 129 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-1668655032129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1668655032119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 71076537 + ... + 71100009.

It is an arithmetic number, because the mean of its divisors is an integer number (63254683580).

Almost surely, 2^{1668655032129} is an apocalyptic number.

It is an amenable number.

1668655032129 is a deficient number, since it is larger than the sum of its proper divisors (861532311071).

1668655032129 is a wasteful number, since it uses less digits than its factorization.

1668655032129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36651 (or 36642 counting only the distinct ones).

The product of its (nonzero) digits is 4665600, while the sum is 54.

The spelling of 1668655032129 in words is "one trillion, six hundred sixty-eight billion, six hundred fifty-five million, thirty-two thousand, one hundred twenty-nine".